4WSW:
reference: Structure and receptor binding preferences of recombinant hemagglutinins from avian and human H6 and H10 influenza A virus subtypes., Yang H, Carney PJ, Chang JC, Villanueva JM, Stevens J, J Virol. 2015 Feb 11. pii: JVI.03456-14. PMID: 25673707

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